Icon for a display screen



The FIGURE is a front view of an icon for a display screen showing our new design.

The uneven length broken line showing of the display screen is for environmental purposes only and forms no part of the claimed design. The even length broken line showing of the flower graphic within the claim area is for environmental purposes only and forms no part of the claimed design. 

The ornamental design for an icon for a display screen, as shown and described. 